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Cheap flights from Montreal to London Heathrow Airport from C$ 415

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
27 Aug — 3 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to London Heathrow are usually found in October or November, booked 90 days in advance, depart on a Sunday or Monday and return on a Sunday

Cheap flight deals from Montreal to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to Heathrow
Explore the most affordable flight options available from Montreal to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 July 2026.

Sun 6/96:25 p.m.
YUL
-
LHR
1 stop22h 10m
Multiple Airlines
Tue 8/96:40 p.m.
LHR
-
YUL
1 stop25h 20m
Multiple Airlines
Deal found 27/7C$ 749
Thu 1/1010:45 p.m.
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Thu 8/106:00 a.m.
LHR
-
YUL
1 stop20h 10m
TAP AIR PORTUGAL
Deal found 26/7C$ 753
Wed 25/119:45 p.m.
YUL
-
LHR
1 stop16h 10m
TAP AIR PORTUGAL
Sat 28/117:55 p.m.
LHR
-
YUL
1 stop29h 00m
TAP AIR PORTUGAL
Deal found 27/7C$ 763
Fri 18/98:40 p.m.
YUL
-
LHR
1 stop30h 35m
SWISS
Mon 21/96:00 a.m.
LHR
-
YUL
1 stop14h 00m
SWISS
Deal found 25/7C$ 769
Sun 15/119:45 p.m.
YUL
-
LHR
1 stop18h 50m
TAP AIR PORTUGAL
Sun 22/116:00 a.m.
LHR
-
YUL
1 stop18h 55m
TAP AIR PORTUGAL
Deal found 27/7C$ 774
Sat 10/106:30 p.m.
YUL
-
LHR
1 stop12h 25m
United Airlines
Mon 12/1011:05 a.m.
LHR
-
YUL
2 stops49h 43m
United Airlines
Deal found 27/7C$ 776
Tue 8/99:45 a.m.
YUL
-
LHR
1 stop21h 10m
United Airlines
Thu 10/911:05 a.m.
LHR
-
YUL
2 stops37h 40m
United Airlines
Deal found 24/7C$ 777
Wed 11/119:45 p.m.
YUL
-
LHR
1 stop12h 45m
TAP AIR PORTUGAL
Sun 22/118:15 a.m.
LHR
-
YUL
1 stop16h 40m
TAP AIR PORTUGAL
Deal found 26/7C$ 780
Wed 18/119:45 p.m.
YUL
-
LHR
1 stop14h 45m
TAP AIR PORTUGAL
Fri 4/126:00 a.m.
LHR
-
YUL
1 stop18h 55m
TAP AIR PORTUGAL
Deal found 26/7C$ 784
Wed 4/119:45 p.m.
YUL
-
LHR
1 stop16h 10m
TAP AIR PORTUGAL
Wed 11/116:00 a.m.
LHR
-
YUL
1 stop18h 55m
TAP AIR PORTUGAL
Deal found 25/7C$ 786
Mon 28/910:45 p.m.
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Wed 7/106:45 p.m.
LHR
-
YUL
1 stop31h 25m
TAP AIR PORTUGAL
Deal found 27/7C$ 787

Find flight deals from Montreal to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 July 2026.

Round-trip from

C$ 749

One-way from

C$ 415

Popular in

December

Cheapest in

October

Average price

C$ 1,202

Good round-trip deal

C$ 833 or less

Good one-way deal

C$ 1,135 or less
SWISS
  • SWISS
  • 6/9-8/9
  • 2 total stops
  • 47h 30m total
  • Montreal to London
Search Deals
6/8
  • 6/8
  • 1 total stop
  • 10h 15m total
  • Montreal to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Montreal (YMQ) to London Heathrow.
Search Deals
Price to beat on a one-way flight from Montreal (YMQ) to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 July 2026.
Use the filters below to find and compare flights from Montreal to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 9/8

5:00 p.m.-1:45 p.m.

1 stop15h 45m

London Heathrow

Sun 16/8

6:30 a.m.-4:55 p.m.

1 stop15h 25m

C$ 925

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 10/8

7:00 p.m.-1:45 p.m.

1 stop13h 45m

London Heathrow

Fri 14/8

6:30 a.m.-4:55 p.m.

1 stop15h 25m

C$ 927

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 23/10

6:50 p.m.-10:45 a.m.

1 stop10h 55m

London Heathrow

Fri 30/10

10:00 a.m.-6:15 p.m.

1 stop12h 15m

C$ 931

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 21/10

7:00 p.m.-10:30 a.m.

1 stop10h 30m

London Heathrow

Thu 29/10

6:20 a.m.-1:15 p.m.

1 stop10h 55m

C$ 935

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 22/10

6:50 p.m.-10:45 a.m.

1 stop10h 55m

London Heathrow

Mon 26/10

6:20 a.m.-4:20 p.m.

1 stop14h 00m

C$ 939

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 20/8

6:00 a.m.-7:10 a.m.

1 stop20h 10m

London Heathrow

Thu 27/8

6:15 a.m.-8:05 p.m.

1 stop18h 50m

C$ 939

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

6:30 p.m.-11:55 a.m.

1 stop12h 25m

London Heathrow

Tue 1/9

9:30 a.m.-5:24 p.m.

1 stop12h 54m

C$ 970

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 11/9

1:10 p.m.-5:55 a.m.

1 stop11h 45m

London Heathrow

Sat 19/9

10:25 a.m.-5:19 p.m.

1 stop11h 54m

C$ 972

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 13/8

10:10 p.m.-10:00 a.m.

Nonstop6h 50m

London Heathrow

Tue 18/8

2:05 p.m.-4:40 p.m.

Nonstop7h 35m

C$ 986

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 18/11

9:15 p.m.-9:05 a.m.

Nonstop6h 50m

London Heathrow

Fri 4/12

4:45 p.m.-7:15 p.m.

Nonstop7h 30m

C$ 991

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from Montreal to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Montreal with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Montreal to London Heathrow Airport

What is the cheapest month to book a flight from Montreal to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Montreal to London Heathrow Airport (average of C$ 891). Flying from Montreal to London Heathrow Airport in December is currently the most expensive (average of C$ 1,309). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YMQ to LHR?

Find hourly flight availability from Montreal to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 July 2026.

When flying from Montreal to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Montreal to London Heathrow Airport

Explore weekly flight availability from Montreal to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 28 July 2026.

The most flights from YMQ to LHR are scheduled on a Tuesday (18 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (13 on average).

How much does it cost to fly round-trip from Montreal to London Heathrow Airport?

Airfare is below average for this route at the moment.
Montreal to London Heathrow Airport flights typically cost between C$ 1,096 and C$ 1,286 in September.
The cheapest round-trip price found within the last 5 days was C$ 749 on Multiple Airlines (6 Sep-8 Sep).

What’s the top layover airport for flights from Montreal to London Heathrow Airport?

Share of one-stop round-trip flights from Montreal to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Lisbon (LIS) – chosen by Cheapflights users on 64% of one-stop itineraries from Montreal to London Heathrow Airport on Cheapflights.

What’s the cheapest layover airport for flights from Montreal to London Heathrow Airport?

Average round-trip fare for 1-stop flights from Montreal to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 553.

What’s the fastest layover option from Montreal to London Heathrow Airport?

Shortest average travel time for 1-stop one-way flights from Montreal to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Ottawa (YOW) have the shortest average one-way travel time for 1-stop routes: 8h 45m.

Which airport typically offers the quickest layover for flights from Montreal to London Heathrow Airport?

Average layover duration for 1-stop one-way flights from Montreal to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Newark (EWR) offer the fastest connection on this route, with an average layover time of 1h 20m.

How often are flights from Montreal to London delayed?

About 23% of weekly flights between Montreal and London have experienced delays in the past year, with the average delay time being 160 minutes.

What is the most punctual flight time for Montreal to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Montreal to London flights?

Over the past year, Air Canada has had the lowest number of delays on this route, with just 23% of flights being delayed.

How far ahead should I book a flight from Montreal to London Heathrow Airport?

The price you pay for your flight from Montreal to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 28 July 2026.
Get a feel of what it's like to fly with American Airlines,Air Canada, andLufthansa from Montreal to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,841 reviews
Check prices

Entertainment

6.8

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
American Airlines
7.1
Good
11,841 reviews
American Airlines
7.1
Good
11,841 reviews
Check prices

Entertainment

6.8

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Air Canada
7.1
Good
11,404 reviews
American Airlines
7.1
Good
11,841 reviews
Check prices

Entertainment

6.8

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Lufthansa
6.8
Okay
8,164 reviews
American Airlines
7.1
Good
11,841 reviews
Check prices

Entertainment

6.8

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
British Airways
6.7
Okay
8,129 reviews
American Airlines
7.1
Good
11,841 reviews
Check prices

Entertainment

6.8

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.

Related info for your journey

Find useful and relevant information for your journey from Montreal to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Montreal to London Heathrow Airport?

    A quick flight from Montreal to London Heathrow Airport can take about 10h 55m. Delta provides one of the quickest options available for as low as C$ 931. Montreal and London Heathrow Airport are separated by a distance of 5213 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Montreal to London Heathrow Airport round-trip?

    Currently priced at C$ 565, TAP AIR PORTUGAL will fly you from Montreal to London Heathrow Airport and back. In addition to TAP AIR PORTUGAL, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and Air Canada - these airlines can fly you to your destination from C$ 772 and C$ 773, respectively. TAP AIR PORTUGAL is 47% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Montreal to London Heathrow Airport one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as C$ 400. However, be on the lookout for offers from Finnair and Lufthansa, as they are both options that can get you from Montreal to London Heathrow Airport for a low price.

  • What are the most reliable airlines from Montreal to London Heathrow Airport?

    The top 3 most reliable airlines when flying from Montreal to London Heathrow Airport are Austrian Airlines (80%), United Airlines (80%) and Lufthansa (80%).

  • What are the cheapest flights from Montreal to London Heathrow Airport?

    Looking for the cheapest flight from Montreal to London Heathrow Airport? While on average our users pay C$ 2,416, our data indicates the cheapest price to be C$ 766. The most popular route (Montreal Pierre Elliott Trudeau Intl - London Heathrow), is priced around C$ 753.

  • Can I find deals for flights from Montreal to Heathrow that include hotel bookings?

    Yes. In addition to deals on Montreal to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montreal to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montreal to Heathrow.

  • Can I find deals for business class flights from Montreal to Heathrow?

    Yes. Cheapflights offers flight deals from Montreal to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Montreal to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Montreal to London Heathrow Airport (average of C$ 891). Flying from Montreal to London Heathrow Airport in December is currently the most expensive (average of C$ 1,309). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Luton
Slough
Marlow
Cobham
Hounslow
Leamington Spa
Northampton
Watford
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

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Fly from Montreal to Heathrow on these airlines

Choose from the following airlines for your flight from Montreal to Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 28 July 2026.
Air Canada flights from Montreal to London Heathrow
British Airways flights from Montreal to London Heathrow
Lufthansa flights from Montreal to London Heathrow

Top 6 airlines flying from Montreal to Heathrow

Discover the top 6 airlines that operate flights from Montreal to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 July 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 565AverageC$ 836FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapestC$ 772AverageC$ 1,056FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapestC$ 773AverageC$ 1,072FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 792AverageC$ 1,095FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapestC$ 794AverageC$ 988FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapestC$ 881AverageC$ 1,136FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Montreal to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Montreal to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Montreal to Heathrow?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Montreal.

Can Cheapflights find flights from Montreal to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Montreal? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Montreal to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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